Nice work, Vunce. I was meaning to try this too and glad you did. Does it also provide a slow ramp up that prevents speaker thump?
Hi X,
No, this capMx doesn’t stop the turn-on thump/cone excursion.
I also put the Fo-Felix EMI Filter for AC mains 120/230v; By Folsom, into the mix. It’s installed between mains input and trafo primaries. I’ve documented in the past the noises I was getting when different combinations of led recessed lights were on throughout my house. I am pleased to say that this filter eliminated almost all the “extra” noises/buzzing I was hearing close to the speaker.
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Thanks for confirmation Aksa
just looking for suitable chokes for CLC, 5A rated should be enough then per channel.
Yes, run it close to rated current to maximise the inductance......
You will need two for each channel, of course, it's expensive and heavy.
I would use around 20mH with DCR no more than 0.66R to minimise losses.
I have an ALPHA running 1.85A and simple CRCRCRC, with two resistors of 0.15 between all electrodes of the caps. That seems to be very quiet and drops 1.66V over the chain. Each RC has an attenuator of around 5, so three RC gives me 125 ripple attenuation, finishing with around 15mV at the output devices. This is sufficient because the first and second stages are heavily filtered.
Cheers,
HD
You will need two for each channel, of course, it's expensive and heavy.
I would use around 20mH with DCR no more than 0.66R to minimise losses.
I have an ALPHA running 1.85A and simple CRCRCRC, with two resistors of 0.15 between all electrodes of the caps. That seems to be very quiet and drops 1.66V over the chain. Each RC has an attenuator of around 5, so three RC gives me 125 ripple attenuation, finishing with around 15mV at the output devices. This is sufficient because the first and second stages are heavily filtered.
Cheers,
HD
That's great that the mr Evil cap mx works to smooth ripples and do the cap multiplying thing, but that's too bad it doesn't have the slow ramp effect. I wonder if changing an RC time constant on the circuit would do this?
Good to hear that the Fo-Felix helps the buzzing noise pickup from the LED lamps and EMI in general. I think it blocks DC too? That might be one reason why the Antek's get saturated.
I know, they go about 15-20€ per piece, so almost 80€. I havent bought anything yet, just planning. Have to measure that can I even fit those chokes inside. More R is not a problem, since I have 30v trafo secondaries.
I kept investigating and found that the “extra” noise stopped when the fans were turned off. After a conversation with X, I installed a CLC filter I had from the AKSA Lender Preamp between the wallwart psu and the PWM fan controller. This combination worked very well to quiet the remaining “noise” I was hearing.
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JPS64 has the right idea, it worked for my setup.
The Fo-Felix is filtering the mains for the Alpha BB only, the psu for the PWM controller and fans is not connected to the Fo-Felix.
Hi guys
I would love to ask a big favor from someone US (resident)or has US shipping address.
I found some parts for my TV at the US eBay, unfortunately, the seller does not ship internationally (Canada). He does not set up to do that so he politely rejected my offer. Can someone help me with these before he will sell his parts?
Not that giant parts but without those, I cannot fix my TV and now I just can NOT purchase a NEW TV. Please contact me via PM.
Thanks very much. I was meditating on these almost two weeks until I took the courage to ask... Unfortunately, I don't have any relatives or close friend to ask for.
I would love to ask a big favor from someone US (resident)or has US shipping address.
I found some parts for my TV at the US eBay, unfortunately, the seller does not ship internationally (Canada). He does not set up to do that so he politely rejected my offer. Can someone help me with these before he will sell his parts?
Not that giant parts but without those, I cannot fix my TV and now I just can NOT purchase a NEW TV. Please contact me via PM.
Thanks very much. I was meditating on these almost two weeks until I took the courage to ask... Unfortunately, I don't have any relatives or close friend to ask for.
Did some soldering tonight, have to ask what those resistors marked in bom as R20x and R22x supposed to be
I have lost track. Can you post the link to the BOM and schematic you are working to?